Cam timing on 426 yamaha - 2002 Yamaha YZ 426 F

Hi there Longhatx....Ok...Turn the crankshaft counterclockwise until the " I " mark on the rotor is aligned with the stationary pointer on the crancase cover.Fit the timing chain onto both camshaft sprockets and install the camshafts on the cylinder head.The camshafts should be installed onto the cylinder head so that the exaust cam sprocket punch mark " E " and the intake cam sprocket punch mark " I " align with the surface of the cylinder head,both marks facing out of course towards their prospective ports.thats about it .Please leave some feedback if this has helped . ride on.

can be tuff-u kinda need 2 people--on my 81 250 I would hold the crank/alt area at the nut with a ratchet-then with my rite hand ratchet the cam sprocket slowly keeping the time marks steady